Power-transmitting mechanism



, June 9; 1925'.

v a. M. ELY

POWER TRANSMITTING MECHANISM ruin July 24, 1924 j r/zard /W M ETEDSTATES PATENT} OFFICE,

BERNARD lvT. ELY, 0F MAR-SHALL, MICHIGAN, ASSIGNOR TO LAMBERT MACHINEGO'M- PANY, OF MARSHALL, "MICHIGAN, A CORPORATION OF MICHIGAN. 1

rownaccaansrirrrrns Mechanism.

Applicationfilcd July 24, 1924. Serial No. 728,016.

To all whom it may concern:

Be it known that I, BERNARD M. ELY, a citizen of the United States,residing at Marshall, in the county of Calhoun and State of lvlichigan,have invented a new and useful Improvement in Power-TransmittingMechanism, of which the following is a specification.

This invention relates to improvements in .power transmitting mechanismand 1s here shown as embodied in a device especially adapted, forexample, inconnection with the driving of a grinding machine such as acoifeegrinding machine One of the objects of my invention is to providea yieldable device for transmitting power from one point to another,insuring the safety of any or all parts of a machine to which it may beattached. For example, in driving a coifee grinding machine, the powermay be transmitted throughmy improved mechanism so that if the grindingburrs become jammed, or if an undue resistance is met through othercauses, the

power transmitting mechanism will yield or slip, thus preventingbreakage or damage to the burrs or other parts.

Although I have stated that my power transmitting mechanism isespecially adapted for use in connection with driving grinding machines,it is apparent that, without'detracting from the spirit of myinvention,the same may be embodied in'any' kind of power, transmitting mechanismwhere-it is desired'to providea slippage or release adapted to operateautomatically when imdue resistance is met. 7 I i In that form of deviceembodyingthe features of my invention shown in the accompanyingdrawings, Figure1 is 'a view in front elevation of the powertransmitting mechanism, and Figure is a vertical sectional view of thesame. p

rks shown in the drawings, 10 indicates a driven shaft adapted to turnthe sprocket 11 mounted thereon which is adapted to be meshed with themechanism of the grinding machine or any other devices which it isintended to operate. 12,indicatesthe driving sprocket. v Q i In general,it may bestated at this point that. the driving sprocket 12 is mountedon the hub 13 of the cup-sha ed disk14. The disk 14: is loosely mounteonthe shaft 10. The shaft 10 also carries tightly mounted vided.

thereon the disk 15 lying within the cup of the cup-shaped disk lt. Thetight disk 15'carries two driving or looking pins 16 adapted to lock thedisks together or permit the disk 1% with the sprocket 12 to rotatefreely on the shaft 10. In general, then, it may be stated that when thelocking or driving pins 16 are in their driving position, which isoutward, the disk 14 is lockedto the-disk 15 so that the shaft 10 willbe driven by the sprocket 12. When the pins 16 are in their unlockedposition, which is inward, the disk 14 is permitted to revolve freely onthe shaft 10 (with the exception of positive locking means to behereinafter describedl. r i The pins 16 are radially mounted on the disk15 and adapted to slide inwardly or outwardly in suitable guides whichare pro- The inner surface of the periphery of the cup part of the disk14 is provided with two beveled sockets 17 adapted to be engaged by theouter ends of the pins 16 whenthey are in their outer or lockedposition. The outer ends of the pins 16 are roundedas shown. Adjacentthe inner end of each of the pins 16 and bearing against the same is anelliptical spring 18 having its ends mounted in the sockets 19 in thespring retaining plates 20 fastened to the disk 15. Each of the springs18 is flexed so that when in the position shown in 1, it will yieldingly press the pin 16 outwardly. It is mounted loosely enough, however,in the sockets 19 so that the pin 16 may be pressed inwardly until thespring 18 snaps to the inner side ofthe center, whereupon obviously itwill cease to press the pin outwardly. In Fig. 1, the lower pinandspring,'are shown broken-lines in the positions they occupy when the pinis in, inits unlocked posltion. The pins 16 are diametrically arranged,and their operation and construction, with associated parts, -,aresimilar.

In alinem'ent with each of the driving pins 16, there is alsoarrangechas shown,

ja, resetting pin 21 which is yieldingly pressed inwardly by aspiralspring 21 as shown. Rotatably mounted on the hub 15 of the disk 15 isacollar 22' having a knurled part 22 to permit ofjitsrotation byhand.The inner part of the collar 22, as indicated by. 22", has twodiametrically arranged raised cam surfaces as indicated by 22, The

cain surfaces are adapted to engage the pins 21 upon rotation oi thecollar 22. The ca n surfaces are so shaped that when the collar 22 is in'the position shown in Fig. 1, the resetting pins 21 will be in theiriiinerinost positions. lVhen the collar is rotated 90, the two raisedportions 22 will engage the pins 21 to force the same outwardly. Theoutward movement of the resetting pins 21, 21 will engage the springs 18when they are in their inner positions (for example, as shown by thelower one in the position in Fig. 1 indicated by the broken lines) andforce the same outwardly until they pass the centers and snap outwardlyto force the driving pins 16 into their outermost or driving positions.

T he disk also carries pivot-ally mounted thereon a pair of short arms23, each carrying at its end a pin 2 yieldingly pressed inwardly by aspring 24. The disks 1st and 15 are provided with holes and 26,respectively, adapted to register when the driving pins 16 are inengagement with the sockets 1 7. lVhen the pin 24. is hot in the holes25, 26, it may be held out of position to one side where it rests in adepression in the disk 15 as it is shown in Fig. 2.

In the operationoi the device, power is transmitted to the disk 15 ironi any desired source. lVhen in driving position, the rounded endsoft-he pins 16 are in the sockets 1?. The two disks 1 and 15 rotatetogether "until an extra. strain is produced, which disengages thedriving pins 16 from the sockets 17 so that the loose disk .14 revolveswith theinotor or other power loosely on the shaft while theshafti'einains stationary. The driving pins are,yieldingly held inposition by the elliptical springs 18 until they are forced out of thesockets by any undue pressure. W hen thus forced out of their socketsthey are pressed inwardly until the springs 18 snap to their innerpositions and thepins 16 then stay in the inner positions unt l they are*agaii'i "forced b ack to their original driving position. The reset--tin o'fthe drivin )ins is accoinolished h turning the hand wheel 22 ineither direction until the raised surfaces 22 force the etting pins 21outwardly to snap the in'gs.18 into their outer posit-ions thus forcingthepins 16 outwardly into their "driving position.

In resetting the driving pins it is necessary to bring both thestationary and revolving disks to a position where the pins 16 willenterthe sockets 17.- For this purpose, the

locating device is used comprising the pin 2%. The arm 23 is swung untilthe pin 24 enters the hole 26 in the disk 1-5. The l'oose disk 14: isthen rotated until the hole 25 registers with the hole 2-6 when the311124 will snap into the h'ol'e25. When in this position the sockets i7are in position torecei've the 7 comprising; v thereon; a t ght disk onthe sl'iaift arranged driving pins 16-. After the driving pins hare beenreset, the locating pin is pulled out of the holes 25 and 26, and the:arm 2?) swung to one side and the. end of the pin '24 allowed to rest inthe depression in the disk 15 to keep it out of the way.

The locating" clevice including the pin 2 1 answers a double purpose. Inthe first pl are, it is used, as above described, to properly positionthe two disks Hand 15 so that the pins 16 will enter the sockets 1:7,and consequently, the pin may be used for holding the two disks firmltogether and positively locking the same in the event that for anyreason it is desired to dispense with the automatic releasii'igmechanism.

While I have shown and described certain embodiments of my invention, itis "to he understood that it is capable of many modifica tions. Changes,therefore, in the construction and arrangement may be made withoutdeparting from thespi'rit and scope of the invention as disclosed in theappended claims, in which it is iny intention to claim all n'ow' 'elt'yinherent in my invention as broadly as possible in view of theprior art.

What I claim as new, and desire to secure by Letters Patent, is: l

.1. A device of the character described, comprising; a shaft; a loosedisk mounted thereon; a tight disk on the shaft arranged adjacent theloose disk; a slida-b le driving pin carried by the tight disk, said pinadapted to he slid inwardly or oi'rti vardly; spring means foryieldingly holding said pin in its inner or outer position; avsockct inthe loose disk adapted to b'eeiiga'ged by the "driving pin when in itsouter position; and means for manually moving said pin from its inner toits outer position, said means including, a resetting pin adapted tomove the driving pin and a rotatable collar surrounding the shaft havinga cam surface adapted to engage the inner end of said resetting pin andforce the same outw'vardly upon rotation of said collar.

2. A device of the character described a shaft; a loose disk mountedadjacent the loose disk; a slidable driving pin carried by the ti fhtdisk, stridpin adapt ed tohe slid inWitlftlT? or outwardly; spring meansfor yieldingly holding said pin in its inner or outer position; a socketin the loose disk adapted to be engaged by the driving pin when in itsouter position; means for manually moving said pin'irom its inner to itsouter position; and means for properly locating the socket in the loosedisk with respect to the driving pin.

8. A device of the character described con'iprising; a emit; a "loosedisk mounted thereon; a tight disk on the shaft arranged adjacent theloose disk; a 'slidable -driving pin carried by the tight disk, said pinadapt ed to he slid inwardly or outwardly; spring means for yieldinglyholding said pin in its inner or outer position; a socket in the loosedisk adapted to be engaged by the driving pin when in its outerposition; means for manually moving said pin from its inner to its outerposition; and means for properly locating the socket in the loose diskwith respect to the driving pin, said means comprising a hole in theloose disk adapted to be brought into registry with a hole in the tightdisk and a pin adapted to be insertet in said holes.

4. A device of the character described comprising; a shaft; a drivingmember mounted on the shaft; a driven member arranged adjacent thedriving member; a slidable driving pin carried by the driving member,said pin adapted to be movedfrom operative to inoperative position andvice versa; spring means for yieldingly holding said pin in itsoperative or inoperative position; a socket in the driven member adaptedto be engaged by the driving pin when in its operative position; andmeans for manually moving said pin from its in operative to itsoperative position, said means including a resetting pin adapted to movethe driving pin and a rotatable collar surrounding the shaft having acam surface adapted to engage said resetting pin and move the same uponrotation of said collar.

5. A device of the character described comprising; a shaft; a drivingmember mounted on the shaft; a driven member arranged adjacent thedriving member; a movable driving pin carried by the driving member,said pin adapted to be moved from operative to inoperative position andvice versa; spring means for yieldingly holding said pin in itsoperative or inoperative position; a socket in the driven member adaptedto be engaged by the driving pin when in its operative position; meansfor manually moving said pin from its inoperative to its operativeposition; and means for properly locating the socket in the drivenmember with respect to thedriving pin.

6. A device of the character described comprising; a shaft; a drivingmember carried by the shaft; a driven member arranged adjacent thedriving member; a slidable driving pin carried by the driving member,said pin adapted to be moved from operative to inoperative position andvice versa; spring means for yieldingly holding said driving pin in itsoperative or inoperative position; a socket in the driven member adaptedto be engaged by the driving pin when in its operative position; meansfor manually moving said driving pin from its inoperative to itsoperative position; and means for properly locating the socket in thedriven member with respect to the driving pin, said means comprising ahole in the driven member adapted to be brought into registry with ahole in the driving member and'a pin adapted to be inserted in saidholes.

7. A device of the character described comprising; a shaft; a drivingmember car ried by the shaft; a driven member arranged adjacent thedriving member; a slidable driving pin carried by the driving member,said pin adapted to be moved from operative to inoperative position andvice versa; a fiat spring adapted to yieldably hold said pin in itsoperative position, said spring adapted to be pressed beyond its deadcenter upon movement of said pin to its inoperative position wherebysaid pin will remain in its inoperative position; and means for manuallymoving said pin from its inoperative to its operative position, saidmeans including a resetting pin adapted to be moved into Contact withsaid flat spring and press the smile past its dead center while incontact with the driving pin whereby said driving pin is moved intooperative position, and a rotatable collar surrounding the shaft havinga cam surface adapted to engage said resetting pin and press the sameagainst said springupon rotation of said collar.

l Vitness my hand and seal this 21st day of July, A. D. 1924.

BERNARD M. ELY. s]

